Which of these is NOT a product of the citric acid cycle?
A. [tex]$NADH + H ^{+}$[/tex]
B. acetyl CoA
C. ATP
D. [tex]$FADH _2$[/tex]
E. [tex]$CO _2$[/tex]
Answer (2)
Acetyl CoA is a reactant that enters the citric acid cycle, whereas the products include N A DH + H + , F A D H 2 , ATP, and C O 2 . Therefore, the compound that is NOT a product of the citric acid cycle is acetyl CoA.
;
The citric acid cycle produces N A DH + H + , F A D H 2 , ATP, and C O 2 .
Acetyl CoA is a reactant that enters the cycle.
Identify acetyl CoA as the compound that is NOT a product of the citric acid cycle.
The final answer is acetyi CoA. a ce t y i C o A
Explanation
Understanding the Citric Acid Cycle The citric acid cycle, also known as the Krebs cycle, is a series of chemical reactions that extract energy from molecules, releasing carbon dioxide and producing high-energy electron carriers. We need to identify which of the listed compounds is NOT a product of this cycle.
Identifying the Products The products of the citric acid cycle are:
N A DH + H + : Nicotinamide adenine dinucleotide (NADH) is an electron carrier.
F A D H 2 : Flavin adenine dinucleotide ( F A D H 2 ) is another electron carrier.
ATP: Adenosine triphosphate (ATP) is a source of energy for cells.
C O 2 : Carbon dioxide is a waste product.
GTP: Guanosine triphosphate (GTP) is similar to ATP and can be converted to ATP.
Acetyl CoA is a reactant that enters the citric acid cycle, not a product.
Finding the Non-Product Comparing the products of the citric acid cycle with the given options, we find that acetyl CoA is not a product.
Final Answer Therefore, the compound that is NOT a product of the citric acid cycle is acetyl CoA.
Examples
The citric acid cycle is a crucial part of cellular respiration, similar to how a car engine converts fuel into energy. Just as a car engine produces exhaust (like C O 2 ), the citric acid cycle produces energy carriers ( N A DH , F A D H 2 , ATP) and waste products. Understanding this cycle helps us see how our bodies convert food into energy, much like understanding how an engine works helps us maintain our vehicles efficiently. This knowledge is vital in fields like medicine and nutrition, where understanding metabolic processes is key to treating diseases and optimizing diets.
